drivers/scsi/osd/osd_initiator.c

   1 /*
   2  * osd_initiator - Main body of the osd initiator library.
   3  *
   4  * Note: The file does not contain the advanced security functionality which
   5  * is only needed by the security_manager's initiators.
   6  *
   7  * Copyright (C) 2008 Panasas Inc.  All rights reserved.
   8  *
   9  * Authors:
  10  *   Boaz Harrosh <ooo@electrozaur.com>
  11  *   Benny Halevy <bhalevy@panasas.com>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License version 2
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  *
  20  *  1. Redistributions of source code must retain the above copyright
  21  *     notice, this list of conditions and the following disclaimer.
  22  *  2. Redistributions in binary form must reproduce the above copyright
  23  *     notice, this list of conditions and the following disclaimer in the
  24  *     documentation and/or other materials provided with the distribution.
  25  *  3. Neither the name of the Panasas company nor the names of its
  26  *     contributors may be used to endorse or promote products derived
  27  *     from this software without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  30  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  31  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  32  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  34  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  35  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  36  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  37  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  38  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  39  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  40  */
  41
  42 #include <linux/slab.h>
  43 #include <linux/module.h>
  44
  45 #include <scsi/osd_initiator.h>
  46 #include <scsi/osd_sec.h>
  47 #include <scsi/osd_attributes.h>
  48 #include <scsi/osd_sense.h>
  49
  50 #include <scsi/scsi_device.h>
  51
  52 #include "osd_debug.h"
  53
  54 #ifndef __unused
  55 #    define __unused                    __attribute__((unused))
  56 #endif
  57
  58 enum { OSD_REQ_RETRIES = 1 };
  59
  60 MODULE_AUTHOR("Boaz Harrosh <ooo@electrozaur.com>");
  61 MODULE_DESCRIPTION("open-osd initiator library libosd.ko");
  62 MODULE_LICENSE("GPL");
  63
  64 static inline void build_test(void)
  65 {
  66         /* structures were not packed */
  67         BUILD_BUG_ON(sizeof(struct osd_capability) != OSD_CAP_LEN);
  68         BUILD_BUG_ON(sizeof(struct osdv2_cdb) != OSD_TOTAL_CDB_LEN);
  69         BUILD_BUG_ON(sizeof(struct osdv1_cdb) != OSDv1_TOTAL_CDB_LEN);
  70 }
  71
  72 static const char *_osd_ver_desc(struct osd_request *or)
  73 {
  74         return osd_req_is_ver1(or) ? "OSD1" : "OSD2";
  75 }
  76
  77 #define ATTR_DEF_RI(id, len) ATTR_DEF(OSD_APAGE_ROOT_INFORMATION, id, len)
  78
  79 static int _osd_get_print_system_info(struct osd_dev *od,
  80         void *caps, struct osd_dev_info *odi)
  81 {
  82         struct osd_request *or;
  83         struct osd_attr get_attrs[] = {
  84                 ATTR_DEF_RI(OSD_ATTR_RI_VENDOR_IDENTIFICATION, 8),
  85                 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_IDENTIFICATION, 16),
  86                 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_MODEL, 32),
  87                 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_REVISION_LEVEL, 4),
  88                 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER, 64 /*variable*/),
  89                 ATTR_DEF_RI(OSD_ATTR_RI_OSD_NAME, 64 /*variable*/),
  90                 ATTR_DEF_RI(OSD_ATTR_RI_TOTAL_CAPACITY, 8),
  91                 ATTR_DEF_RI(OSD_ATTR_RI_USED_CAPACITY, 8),
  92                 ATTR_DEF_RI(OSD_ATTR_RI_NUMBER_OF_PARTITIONS, 8),
  93                 ATTR_DEF_RI(OSD_ATTR_RI_CLOCK, 6),
  94                 /* IBM-OSD-SIM Has a bug with this one put it last */
  95                 ATTR_DEF_RI(OSD_ATTR_RI_OSD_SYSTEM_ID, 20),
  96         };
  97         void *iter = NULL, *pFirst;
  98         int nelem = ARRAY_SIZE(get_attrs), a = 0;
  99         int ret;
 100
 101         or = osd_start_request(od, GFP_KERNEL);
 102         if (!or)
 103                 return -ENOMEM;
 104
 105         /* get attrs */
 106         osd_req_get_attributes(or, &osd_root_object);
 107         osd_req_add_get_attr_list(or, get_attrs, ARRAY_SIZE(get_attrs));
 108
 109         ret = osd_finalize_request(or, 0, caps, NULL);
 110         if (ret)
 111                 goto out;
 112
 113         ret = osd_execute_request(or);
 114         if (ret) {
 115                 OSD_ERR("Failed to detect %s => %d\n", _osd_ver_desc(or), ret);
 116                 goto out;
 117         }
 118
 119         osd_req_decode_get_attr_list(or, get_attrs, &nelem, &iter);
 120
 121         OSD_INFO("Detected %s device\n",
 122                 _osd_ver_desc(or));
 123
 124         pFirst = get_attrs[a++].val_ptr;
 125         OSD_INFO("VENDOR_IDENTIFICATION  [%s]\n",
 126                 (char *)pFirst);
 127
 128         pFirst = get_attrs[a++].val_ptr;
 129         OSD_INFO("PRODUCT_IDENTIFICATION [%s]\n",
 130                 (char *)pFirst);
 131
 132         pFirst = get_attrs[a++].val_ptr;
 133         OSD_INFO("PRODUCT_MODEL          [%s]\n",
 134                 (char *)pFirst);
 135
 136         pFirst = get_attrs[a++].val_ptr;
 137         OSD_INFO("PRODUCT_REVISION_LEVEL [%u]\n",
 138                 pFirst ? get_unaligned_be32(pFirst) : ~0U);
 139
 140         pFirst = get_attrs[a++].val_ptr;
 141         OSD_INFO("PRODUCT_SERIAL_NUMBER  [%s]\n",
 142                 (char *)pFirst);
 143
 144         odi->osdname_len = get_attrs[a].len;
 145         /* Avoid NULL for memcmp optimization 0-length is good enough */
 146         odi->osdname = kzalloc(odi->osdname_len + 1, GFP_KERNEL);
 147         if (!odi->osdname) {
 148                 ret = -ENOMEM;
 149                 goto out;
 150         }
 151         if (odi->osdname_len)
 152                 memcpy(odi->osdname, get_attrs[a].val_ptr, odi->osdname_len);
 153         OSD_INFO("OSD_NAME               [%s]\n", odi->osdname);
 154         a++;
 155
 156         pFirst = get_attrs[a++].val_ptr;
 157         OSD_INFO("TOTAL_CAPACITY         [0x%llx]\n",
 158                 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
 159
 160         pFirst = get_attrs[a++].val_ptr;
 161         OSD_INFO("USED_CAPACITY          [0x%llx]\n",
 162                 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
 163
 164         pFirst = get_attrs[a++].val_ptr;
 165         OSD_INFO("NUMBER_OF_PARTITIONS   [%llu]\n",
 166                 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
 167
 168         if (a >= nelem)
 169                 goto out;
 170
 171         /* FIXME: Where are the time utilities */
 172         pFirst = get_attrs[a++].val_ptr;
 173         OSD_INFO("CLOCK                  [0x%6phN]\n", pFirst);
 174
 175         if (a < nelem) { /* IBM-OSD-SIM bug, Might not have it */
 176                 unsigned len = get_attrs[a].len;
 177                 char sid_dump[32*4 + 2]; /* 2nibbles+space+ASCII */
 178
 179                 hex_dump_to_buffer(get_attrs[a].val_ptr, len, 32, 1,
 180                                    sid_dump, sizeof(sid_dump), true);
 181                 OSD_INFO("OSD_SYSTEM_ID(%d)\n"
 182                          "        [%s]\n", len, sid_dump);
 183
 184                 if (unlikely(len > sizeof(odi->systemid))) {
 185                         OSD_ERR("OSD Target error: OSD_SYSTEM_ID too long(%d). "
 186                                 "device identification might not work\n", len);
 187                         len = sizeof(odi->systemid);
 188                 }
 189                 odi->systemid_len = len;
 190                 memcpy(odi->systemid, get_attrs[a].val_ptr, len);
 191                 a++;
 192         }
 193 out:
 194         osd_end_request(or);
 195         return ret;
 196 }
 197
 198 int osd_auto_detect_ver(struct osd_dev *od,
 199         void *caps, struct osd_dev_info *odi)
 200 {
 201         int ret;
 202
 203         /* Auto-detect the osd version */
 204         ret = _osd_get_print_system_info(od, caps, odi);
 205         if (ret) {
 206                 osd_dev_set_ver(od, OSD_VER1);
 207                 OSD_DEBUG("converting to OSD1\n");
 208                 ret = _osd_get_print_system_info(od, caps, odi);
 209         }
 210
 211         return ret;
 212 }
 213 EXPORT_SYMBOL(osd_auto_detect_ver);
 214
 215 static unsigned _osd_req_cdb_len(struct osd_request *or)
 216 {
 217         return osd_req_is_ver1(or) ? OSDv1_TOTAL_CDB_LEN : OSD_TOTAL_CDB_LEN;
 218 }
 219
 220 static unsigned _osd_req_alist_elem_size(struct osd_request *or, unsigned len)
 221 {
 222         return osd_req_is_ver1(or) ?
 223                 osdv1_attr_list_elem_size(len) :
 224                 osdv2_attr_list_elem_size(len);
 225 }
 226
 227 static void _osd_req_alist_elem_encode(struct osd_request *or,
 228         void *attr_last, const struct osd_attr *oa)
 229 {
 230         if (osd_req_is_ver1(or)) {
 231                 struct osdv1_attributes_list_element *attr = attr_last;
 232
 233                 attr->attr_page = cpu_to_be32(oa->attr_page);
 234                 attr->attr_id = cpu_to_be32(oa->attr_id);
 235                 attr->attr_bytes = cpu_to_be16(oa->len);
 236                 memcpy(attr->attr_val, oa->val_ptr, oa->len);
 237         } else {
 238                 struct osdv2_attributes_list_element *attr = attr_last;
 239
 240                 attr->attr_page = cpu_to_be32(oa->attr_page);
 241                 attr->attr_id = cpu_to_be32(oa->attr_id);
 242                 attr->attr_bytes = cpu_to_be16(oa->len);
 243                 memcpy(attr->attr_val, oa->val_ptr, oa->len);
 244         }
 245 }
 246
 247 static int _osd_req_alist_elem_decode(struct osd_request *or,
 248         void *cur_p, struct osd_attr *oa, unsigned max_bytes)
 249 {
 250         unsigned inc;
 251         if (osd_req_is_ver1(or)) {
 252                 struct osdv1_attributes_list_element *attr = cur_p;
 253
 254                 if (max_bytes < sizeof(*attr))
 255                         return -1;
 256
 257                 oa->len = be16_to_cpu(attr->attr_bytes);
 258                 inc = _osd_req_alist_elem_size(or, oa->len);
 259                 if (inc > max_bytes)
 260                         return -1;
 261
 262                 oa->attr_page = be32_to_cpu(attr->attr_page);
 263                 oa->attr_id = be32_to_cpu(attr->attr_id);
 264
 265                 /* OSD1: On empty attributes we return a pointer to 2 bytes
 266                  * of zeros. This keeps similar behaviour with OSD2.
 267                  * (See below)
 268                  */
 269                 oa->val_ptr = likely(oa->len) ? attr->attr_val :
 270                                                 (u8 *)&attr->attr_bytes;
 271         } else {
 272                 struct osdv2_attributes_list_element *attr = cur_p;
 273
 274                 if (max_bytes < sizeof(*attr))
 275                         return -1;
 276
 277                 oa->len = be16_to_cpu(attr->attr_bytes);
 278                 inc = _osd_req_alist_elem_size(or, oa->len);
 279                 if (inc > max_bytes)
 280                         return -1;
 281
 282                 oa->attr_page = be32_to_cpu(attr->attr_page);
 283                 oa->attr_id = be32_to_cpu(attr->attr_id);
 284
 285                 /* OSD2: For convenience, on empty attributes, we return 8 bytes
 286                  * of zeros here. This keeps the same behaviour with OSD2r04,
 287                  * and is nice with null terminating ASCII fields.
 288                  * oa->val_ptr == NULL marks the end-of-list, or error.
 289                  */
 290                 oa->val_ptr = likely(oa->len) ? attr->attr_val : attr->reserved;
 291         }
 292         return inc;
 293 }
 294
 295 static unsigned _osd_req_alist_size(struct osd_request *or, void *list_head)
 296 {
 297         return osd_req_is_ver1(or) ?
 298                 osdv1_list_size(list_head) :
 299                 osdv2_list_size(list_head);
 300 }
 301
 302 static unsigned _osd_req_sizeof_alist_header(struct osd_request *or)
 303 {
 304         return osd_req_is_ver1(or) ?
 305                 sizeof(struct osdv1_attributes_list_header) :
 306                 sizeof(struct osdv2_attributes_list_header);
 307 }
 308
 309 static void _osd_req_set_alist_type(struct osd_request *or,
 310         void *list, int list_type)
 311 {
 312         if (osd_req_is_ver1(or)) {
 313                 struct osdv1_attributes_list_header *attr_list = list;
 314
 315                 memset(attr_list, 0, sizeof(*attr_list));
 316                 attr_list->type = list_type;
 317         } else {
 318                 struct osdv2_attributes_list_header *attr_list = list;
 319
 320                 memset(attr_list, 0, sizeof(*attr_list));
 321                 attr_list->type = list_type;
 322         }
 323 }
 324
 325 static bool _osd_req_is_alist_type(struct osd_request *or,
 326         void *list, int list_type)
 327 {
 328         if (!list)
 329                 return false;
 330
 331         if (osd_req_is_ver1(or)) {
 332                 struct osdv1_attributes_list_header *attr_list = list;
 333
 334                 return attr_list->type == list_type;
 335         } else {
 336                 struct osdv2_attributes_list_header *attr_list = list;
 337
 338                 return attr_list->type == list_type;
 339         }
 340 }
 341
 342 /* This is for List-objects not Attributes-Lists */
 343 static void _osd_req_encode_olist(struct osd_request *or,
 344         struct osd_obj_id_list *list)
 345 {
 346         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
 347
 348         if (osd_req_is_ver1(or)) {
 349                 cdbh->v1.list_identifier = list->list_identifier;
 350                 cdbh->v1.start_address = list->continuation_id;
 351         } else {
 352                 cdbh->v2.list_identifier = list->list_identifier;
 353                 cdbh->v2.start_address = list->continuation_id;
 354         }
 355 }
 356
 357 static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
 358         u64 offset, unsigned *padding)
 359 {
 360         return __osd_encode_offset(offset, padding,
 361                         osd_req_is_ver1(or) ?
 362                                 OSDv1_OFFSET_MIN_SHIFT : OSD_OFFSET_MIN_SHIFT,
 363                         OSD_OFFSET_MAX_SHIFT);
 364 }
 365
 366 static struct osd_security_parameters *
 367 _osd_req_sec_params(struct osd_request *or)
 368 {
 369         struct osd_cdb *ocdb = &or->cdb;
 370
 371         if (osd_req_is_ver1(or))
 372                 return (struct osd_security_parameters *)&ocdb->v1.sec_params;
 373         else
 374                 return (struct osd_security_parameters *)&ocdb->v2.sec_params;
 375 }
 376
 377 void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)
 378 {
 379         memset(osdd, 0, sizeof(*osdd));
 380         osdd->scsi_device = scsi_device;
 381         osdd->def_timeout = BLK_DEFAULT_SG_TIMEOUT;
 382 #ifdef OSD_VER1_SUPPORT
 383         osdd->version = OSD_VER2;
 384 #endif
 385         /* TODO: Allocate pools for osd_request attributes ... */
 386 }
 387 EXPORT_SYMBOL(osd_dev_init);
 388
 389 void osd_dev_fini(struct osd_dev *osdd)
 390 {
 391         /* TODO: De-allocate pools */
 392
 393         osdd->scsi_device = NULL;
 394 }
 395 EXPORT_SYMBOL(osd_dev_fini);
 396
 397 static struct osd_request *_osd_request_alloc(gfp_t gfp)
 398 {
 399         struct osd_request *or;
 400
 401         /* TODO: Use mempool with one saved request */
 402         or = kzalloc(sizeof(*or), gfp);
 403         return or;
 404 }
 405
 406 static void _osd_request_free(struct osd_request *or)
 407 {
 408         kfree(or);
 409 }
 410
 411 struct osd_request *osd_start_request(struct osd_dev *dev, gfp_t gfp)
 412 {
 413         struct osd_request *or;
 414
 415         or = _osd_request_alloc(gfp);
 416         if (!or)
 417                 return NULL;
 418
 419         or->osd_dev = dev;
 420         or->alloc_flags = gfp;
 421         or->timeout = dev->def_timeout;
 422         or->retries = OSD_REQ_RETRIES;
 423
 424         return or;
 425 }
 426 EXPORT_SYMBOL(osd_start_request);
 427
 428 static void _osd_free_seg(struct osd_request *or __unused,
 429         struct _osd_req_data_segment *seg)
 430 {
 431         if (!seg->buff || !seg->alloc_size)
 432                 return;
 433
 434         kfree(seg->buff);
 435         seg->buff = NULL;
 436         seg->alloc_size = 0;
 437 }
 438
 439 static void _put_request(struct request *rq)
 440 {
 441         /*
 442          * If osd_finalize_request() was called but the request was not
 443          * executed through the block layer, then we must release BIOs.
 444          * TODO: Keep error code in or->async_error. Need to audit all
 445          *       code paths.
 446          */
 447         if (unlikely(rq->bio))
 448                 blk_end_request(rq, -ENOMEM, blk_rq_bytes(rq));
 449         else
 450                 blk_put_request(rq);
 451 }
 452
 453 void osd_end_request(struct osd_request *or)
 454 {
 455         struct request *rq = or->request;
 456
 457         if (rq) {
 458                 if (rq->next_rq) {
 459                         _put_request(rq->next_rq);
 460                         rq->next_rq = NULL;
 461                 }
 462
 463                 _put_request(rq);
 464         }
 465
 466         _osd_free_seg(or, &or->get_attr);
 467         _osd_free_seg(or, &or->enc_get_attr);
 468         _osd_free_seg(or, &or->set_attr);
 469         _osd_free_seg(or, &or->cdb_cont);
 470
 471         _osd_request_free(or);
 472 }
 473 EXPORT_SYMBOL(osd_end_request);
 474
 475 static void _set_error_resid(struct osd_request *or, struct request *req,
 476                              int error)
 477 {
 478         or->async_error = error;
 479         or->req_errors = req->errors ? : error;
 480         or->sense_len = req->sense_len;
 481         if (or->out.req)
 482                 or->out.residual = or->out.req->resid_len;
 483         if (or->in.req)
 484                 or->in.residual = or->in.req->resid_len;
 485 }
 486
 487 int osd_execute_request(struct osd_request *or)
 488 {
 489         int error = blk_execute_rq(or->request->q, NULL, or->request, 0);
 490
 491         _set_error_resid(or, or->request, error);
 492         return error;
 493 }
 494 EXPORT_SYMBOL(osd_execute_request);
 495
 496 static void osd_request_async_done(struct request *req, int error)
 497 {
 498         struct osd_request *or = req->end_io_data;
 499
 500         _set_error_resid(or, req, error);
 501         if (req->next_rq) {
 502                 __blk_put_request(req->q, req->next_rq);
 503                 req->next_rq = NULL;
 504         }
 505
 506         __blk_put_request(req->q, req);
 507         or->request = NULL;
 508         or->in.req = NULL;
 509         or->out.req = NULL;
 510
 511         if (or->async_done)
 512                 or->async_done(or, or->async_private);
 513         else
 514                 osd_end_request(or);
 515 }
 516
 517 int osd_execute_request_async(struct osd_request *or,
 518         osd_req_done_fn *done, void *private)
 519 {
 520         or->request->end_io_data = or;
 521         or->async_private = private;
 522         or->async_done = done;
 523
 524         blk_execute_rq_nowait(or->request->q, NULL, or->request, 0,
 525                               osd_request_async_done);
 526         return 0;
 527 }
 528 EXPORT_SYMBOL(osd_execute_request_async);
 529
 530 u8 sg_out_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
 531 u8 sg_in_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
 532
 533 static int _osd_realloc_seg(struct osd_request *or,
 534         struct _osd_req_data_segment *seg, unsigned max_bytes)
 535 {
 536         void *buff;
 537
 538         if (seg->alloc_size >= max_bytes)
 539                 return 0;
 540
 541         buff = krealloc(seg->buff, max_bytes, or->alloc_flags);
 542         if (!buff) {
 543                 OSD_ERR("Failed to Realloc %d-bytes was-%d\n", max_bytes,
 544                         seg->alloc_size);
 545                 return -ENOMEM;
 546         }
 547
 548         memset(buff + seg->alloc_size, 0, max_bytes - seg->alloc_size);
 549         seg->buff = buff;
 550         seg->alloc_size = max_bytes;
 551         return 0;
 552 }
 553
 554 static int _alloc_cdb_cont(struct osd_request *or, unsigned total_bytes)
 555 {
 556         OSD_DEBUG("total_bytes=%d\n", total_bytes);
 557         return _osd_realloc_seg(or, &or->cdb_cont, total_bytes);
 558 }
 559
 560 static int _alloc_set_attr_list(struct osd_request *or,
 561         const struct osd_attr *oa, unsigned nelem, unsigned add_bytes)
 562 {
 563         unsigned total_bytes = add_bytes;
 564
 565         for (; nelem; --nelem, ++oa)
 566                 total_bytes += _osd_req_alist_elem_size(or, oa->len);
 567
 568         OSD_DEBUG("total_bytes=%d\n", total_bytes);
 569         return _osd_realloc_seg(or, &or->set_attr, total_bytes);
 570 }
 571
 572 static int _alloc_get_attr_desc(struct osd_request *or, unsigned max_bytes)
 573 {
 574         OSD_DEBUG("total_bytes=%d\n", max_bytes);
 575         return _osd_realloc_seg(or, &or->enc_get_attr, max_bytes);
 576 }
 577
 578 static int _alloc_get_attr_list(struct osd_request *or)
 579 {
 580         OSD_DEBUG("total_bytes=%d\n", or->get_attr.total_bytes);
 581         return _osd_realloc_seg(or, &or->get_attr, or->get_attr.total_bytes);
 582 }
 583
 584 /*
 585  * Common to all OSD commands
 586  */
 587
 588 static void _osdv1_req_encode_common(struct osd_request *or,
 589         __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 590 {
 591         struct osdv1_cdb *ocdb = &or->cdb.v1;
 592
 593         /*
 594          * For speed, the commands
 595          *      OSD_ACT_PERFORM_SCSI_COMMAND    , V1 0x8F7E, V2 0x8F7C
 596          *      OSD_ACT_SCSI_TASK_MANAGEMENT    , V1 0x8F7F, V2 0x8F7D
 597          * are not supported here. Should pass zero and set after the call
 598          */
 599         act &= cpu_to_be16(~0x0080); /* V1 action code */
 600
 601         OSD_DEBUG("OSDv1 execute opcode 0x%x\n", be16_to_cpu(act));
 602
 603         ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
 604         ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
 605         ocdb->h.varlen_cdb.service_action = act;
 606
 607         ocdb->h.partition = cpu_to_be64(obj->partition);
 608         ocdb->h.object = cpu_to_be64(obj->id);
 609         ocdb->h.v1.length = cpu_to_be64(len);
 610         ocdb->h.v1.start_address = cpu_to_be64(offset);
 611 }
 612
 613 static void _osdv2_req_encode_common(struct osd_request *or,
 614          __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 615 {
 616         struct osdv2_cdb *ocdb = &or->cdb.v2;
 617
 618         OSD_DEBUG("OSDv2 execute opcode 0x%x\n", be16_to_cpu(act));
 619
 620         ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
 621         ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
 622         ocdb->h.varlen_cdb.service_action = act;
 623
 624         ocdb->h.partition = cpu_to_be64(obj->partition);
 625         ocdb->h.object = cpu_to_be64(obj->id);
 626         ocdb->h.v2.length = cpu_to_be64(len);
 627         ocdb->h.v2.start_address = cpu_to_be64(offset);
 628 }
 629
 630 static void _osd_req_encode_common(struct osd_request *or,
 631         __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 632 {
 633         if (osd_req_is_ver1(or))
 634                 _osdv1_req_encode_common(or, act, obj, offset, len);
 635         else
 636                 _osdv2_req_encode_common(or, act, obj, offset, len);
 637 }
 638
 639 /*
 640  * Device commands
 641  */
 642 /*TODO: void osd_req_set_master_seed_xchg(struct osd_request *, ...); */
 643 /*TODO: void osd_req_set_master_key(struct osd_request *, ...); */
 644
 645 void osd_req_format(struct osd_request *or, u64 tot_capacity)
 646 {
 647         _osd_req_encode_common(or, OSD_ACT_FORMAT_OSD, &osd_root_object, 0,
 648                                 tot_capacity);
 649 }
 650 EXPORT_SYMBOL(osd_req_format);
 651
 652 int osd_req_list_dev_partitions(struct osd_request *or,
 653         osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem)
 654 {
 655         return osd_req_list_partition_objects(or, 0, initial_id, list, nelem);
 656 }
 657 EXPORT_SYMBOL(osd_req_list_dev_partitions);
 658
 659 static void _osd_req_encode_flush(struct osd_request *or,
 660         enum osd_options_flush_scope_values op)
 661 {
 662         struct osd_cdb_head *ocdb = osd_cdb_head(&or->cdb);
 663
 664         ocdb->command_specific_options = op;
 665 }
 666
 667 void osd_req_flush_obsd(struct osd_request *or,
 668         enum osd_options_flush_scope_values op)
 669 {
 670         _osd_req_encode_common(or, OSD_ACT_FLUSH_OSD, &osd_root_object, 0, 0);
 671         _osd_req_encode_flush(or, op);
 672 }
 673 EXPORT_SYMBOL(osd_req_flush_obsd);
 674
 675 /*TODO: void osd_req_perform_scsi_command(struct osd_request *,
 676         const u8 *cdb, ...); */
 677 /*TODO: void osd_req_task_management(struct osd_request *, ...); */
 678
 679 /*
 680  * Partition commands
 681  */
 682 static void _osd_req_encode_partition(struct osd_request *or,
 683         __be16 act, osd_id partition)
 684 {
 685         struct osd_obj_id par = {
 686                 .partition = partition,
 687                 .id = 0,
 688         };
 689
 690         _osd_req_encode_common(or, act, &par, 0, 0);
 691 }
 692
 693 void osd_req_create_partition(struct osd_request *or, osd_id partition)
 694 {
 695         _osd_req_encode_partition(or, OSD_ACT_CREATE_PARTITION, partition);
 696 }
 697 EXPORT_SYMBOL(osd_req_create_partition);
 698
 699 void osd_req_remove_partition(struct osd_request *or, osd_id partition)
 700 {
 701         _osd_req_encode_partition(or, OSD_ACT_REMOVE_PARTITION, partition);
 702 }
 703 EXPORT_SYMBOL(osd_req_remove_partition);
 704
 705 /*TODO: void osd_req_set_partition_key(struct osd_request *,
 706         osd_id partition, u8 new_key_id[OSD_CRYPTO_KEYID_SIZE],
 707         u8 seed[OSD_CRYPTO_SEED_SIZE]); */
 708
 709 static int _osd_req_list_objects(struct osd_request *or,
 710         __be16 action, const struct osd_obj_id *obj, osd_id initial_id,
 711         struct osd_obj_id_list *list, unsigned nelem)
 712 {
 713         struct request_queue *q = osd_request_queue(or->osd_dev);
 714         u64 len = nelem * sizeof(osd_id) + sizeof(*list);
 715         struct bio *bio;
 716
 717         _osd_req_encode_common(or, action, obj, (u64)initial_id, len);
 718
 719         if (list->list_identifier)
 720                 _osd_req_encode_olist(or, list);
 721
 722         WARN_ON(or->in.bio);
 723         bio = bio_map_kern(q, list, len, or->alloc_flags);
 724         if (IS_ERR(bio)) {
 725                 OSD_ERR("!!! Failed to allocate list_objects BIO\n");
 726                 return PTR_ERR(bio);
 727         }
 728
 729         bio_set_op_attrs(bio, REQ_OP_READ, 0);
 730         or->in.bio = bio;
 731         or->in.total_bytes = bio->bi_iter.bi_size;
 732         return 0;
 733 }
 734
 735 int osd_req_list_partition_collections(struct osd_request *or,
 736         osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
 737         unsigned nelem)
 738 {
 739         struct osd_obj_id par = {
 740                 .partition = partition,
 741                 .id = 0,
 742         };
 743
 744         return osd_req_list_collection_objects(or, &par, initial_id, list,
 745                                                nelem);
 746 }
 747 EXPORT_SYMBOL(osd_req_list_partition_collections);
 748
 749 int osd_req_list_partition_objects(struct osd_request *or,
 750         osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
 751         unsigned nelem)
 752 {
 753         struct osd_obj_id par = {
 754                 .partition = partition,
 755                 .id = 0,
 756         };
 757
 758         return _osd_req_list_objects(or, OSD_ACT_LIST, &par, initial_id, list,
 759                                      nelem);
 760 }
 761 EXPORT_SYMBOL(osd_req_list_partition_objects);
 762
 763 void osd_req_flush_partition(struct osd_request *or,
 764         osd_id partition, enum osd_options_flush_scope_values op)
 765 {
 766         _osd_req_encode_partition(or, OSD_ACT_FLUSH_PARTITION, partition);
 767         _osd_req_encode_flush(or, op);
 768 }
 769 EXPORT_SYMBOL(osd_req_flush_partition);
 770
 771 /*
 772  * Collection commands
 773  */
 774 /*TODO: void osd_req_create_collection(struct osd_request *,
 775         const struct osd_obj_id *); */
 776 /*TODO: void osd_req_remove_collection(struct osd_request *,
 777         const struct osd_obj_id *); */
 778
 779 int osd_req_list_collection_objects(struct osd_request *or,
 780         const struct osd_obj_id *obj, osd_id initial_id,
 781         struct osd_obj_id_list *list, unsigned nelem)
 782 {
 783         return _osd_req_list_objects(or, OSD_ACT_LIST_COLLECTION, obj,
 784                                      initial_id, list, nelem);
 785 }
 786 EXPORT_SYMBOL(osd_req_list_collection_objects);
 787
 788 /*TODO: void query(struct osd_request *, ...); V2 */
 789
 790 void osd_req_flush_collection(struct osd_request *or,
 791         const struct osd_obj_id *obj, enum osd_options_flush_scope_values op)
 792 {
 793         _osd_req_encode_common(or, OSD_ACT_FLUSH_PARTITION, obj, 0, 0);
 794         _osd_req_encode_flush(or, op);
 795 }
 796 EXPORT_SYMBOL(osd_req_flush_collection);
 797
 798 /*TODO: void get_member_attrs(struct osd_request *, ...); V2 */
 799 /*TODO: void set_member_attrs(struct osd_request *, ...); V2 */
 800
 801 /*
 802  * Object commands
 803  */
 804 void osd_req_create_object(struct osd_request *or, struct osd_obj_id *obj)
 805 {
 806         _osd_req_encode_common(or, OSD_ACT_CREATE, obj, 0, 0);
 807 }
 808 EXPORT_SYMBOL(osd_req_create_object);
 809
 810 void osd_req_remove_object(struct osd_request *or, struct osd_obj_id *obj)
 811 {
 812         _osd_req_encode_common(or, OSD_ACT_REMOVE, obj, 0, 0);
 813 }
 814 EXPORT_SYMBOL(osd_req_remove_object);
 815
 816
 817 /*TODO: void osd_req_create_multi(struct osd_request *or,
 818         struct osd_obj_id *first, struct osd_obj_id_list *list, unsigned nelem);
 819 */
 820
 821 void osd_req_write(struct osd_request *or,
 822         const struct osd_obj_id *obj, u64 offset,
 823         struct bio *bio, u64 len)
 824 {
 825         _osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, len);
 826         WARN_ON(or->out.bio || or->out.total_bytes);
 827         WARN_ON(!op_is_write(bio_op(bio)));
 828         or->out.bio = bio;
 829         or->out.total_bytes = len;
 830 }
 831 EXPORT_SYMBOL(osd_req_write);
 832
 833 int osd_req_write_kern(struct osd_request *or,
 834         const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
 835 {
 836         struct request_queue *req_q = osd_request_queue(or->osd_dev);
 837         struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
 838
 839         if (IS_ERR(bio))
 840                 return PTR_ERR(bio);
 841
 842         bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 843         osd_req_write(or, obj, offset, bio, len);
 844         return 0;
 845 }
 846 EXPORT_SYMBOL(osd_req_write_kern);
 847
 848 /*TODO: void osd_req_append(struct osd_request *,
 849         const struct osd_obj_id *, struct bio *data_out); */
 850 /*TODO: void osd_req_create_write(struct osd_request *,
 851         const struct osd_obj_id *, struct bio *data_out, u64 offset); */
 852 /*TODO: void osd_req_clear(struct osd_request *,
 853         const struct osd_obj_id *, u64 offset, u64 len); */
 854 /*TODO: void osd_req_punch(struct osd_request *,
 855         const struct osd_obj_id *, u64 offset, u64 len); V2 */
 856
 857 void osd_req_flush_object(struct osd_request *or,
 858         const struct osd_obj_id *obj, enum osd_options_flush_scope_values op,
 859         /*V2*/ u64 offset, /*V2*/ u64 len)
 860 {
 861         if (unlikely(osd_req_is_ver1(or) && (offset || len))) {
 862                 OSD_DEBUG("OSD Ver1 flush on specific range ignored\n");
 863                 offset = 0;
 864                 len = 0;
 865         }
 866
 867         _osd_req_encode_common(or, OSD_ACT_FLUSH, obj, offset, len);
 868         _osd_req_encode_flush(or, op);
 869 }
 870 EXPORT_SYMBOL(osd_req_flush_object);
 871
 872 void osd_req_read(struct osd_request *or,
 873         const struct osd_obj_id *obj, u64 offset,
 874         struct bio *bio, u64 len)
 875 {
 876         _osd_req_encode_common(or, OSD_ACT_READ, obj, offset, len);
 877         WARN_ON(or->in.bio || or->in.total_bytes);
 878         WARN_ON(op_is_write(bio_op(bio)));
 879         or->in.bio = bio;
 880         or->in.total_bytes = len;
 881 }
 882 EXPORT_SYMBOL(osd_req_read);
 883
 884 int osd_req_read_kern(struct osd_request *or,
 885         const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
 886 {
 887         struct request_queue *req_q = osd_request_queue(or->osd_dev);
 888         struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
 889
 890         if (IS_ERR(bio))
 891                 return PTR_ERR(bio);
 892
 893         osd_req_read(or, obj, offset, bio, len);
 894         return 0;
 895 }
 896 EXPORT_SYMBOL(osd_req_read_kern);
 897
 898 static int _add_sg_continuation_descriptor(struct osd_request *or,
 899         const struct osd_sg_entry *sglist, unsigned numentries, u64 *len)
 900 {
 901         struct osd_sg_continuation_descriptor *oscd;
 902         u32 oscd_size;
 903         unsigned i;
 904         int ret;
 905
 906         oscd_size = sizeof(*oscd) + numentries * sizeof(oscd->entries[0]);
 907
 908         if (!or->cdb_cont.total_bytes) {
 909                 /* First time, jump over the header, we will write to:
 910                  *      cdb_cont.buff + cdb_cont.total_bytes
 911                  */
 912                 or->cdb_cont.total_bytes =
 913                                 sizeof(struct osd_continuation_segment_header);
 914         }
 915
 916         ret = _alloc_cdb_cont(or, or->cdb_cont.total_bytes + oscd_size);
 917         if (unlikely(ret))
 918                 return ret;
 919
 920         oscd = or->cdb_cont.buff + or->cdb_cont.total_bytes;
 921         oscd->hdr.type = cpu_to_be16(SCATTER_GATHER_LIST);
 922         oscd->hdr.pad_length = 0;
 923         oscd->hdr.length = cpu_to_be32(oscd_size - sizeof(*oscd));
 924
 925         *len = 0;
 926         /* copy the sg entries and convert to network byte order */
 927         for (i = 0; i < numentries; i++) {
 928                 oscd->entries[i].offset = cpu_to_be64(sglist[i].offset);
 929                 oscd->entries[i].len    = cpu_to_be64(sglist[i].len);
 930                 *len += sglist[i].len;
 931         }
 932
 933         or->cdb_cont.total_bytes += oscd_size;
 934         OSD_DEBUG("total_bytes=%d oscd_size=%d numentries=%d\n",
 935                   or->cdb_cont.total_bytes, oscd_size, numentries);
 936         return 0;
 937 }
 938
 939 static int _osd_req_finalize_cdb_cont(struct osd_request *or, const u8 *cap_key)
 940 {
 941         struct request_queue *req_q = osd_request_queue(or->osd_dev);
 942         struct bio *bio;
 943         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
 944         struct osd_continuation_segment_header *cont_seg_hdr;
 945
 946         if (!or->cdb_cont.total_bytes)
 947                 return 0;
 948
 949         cont_seg_hdr = or->cdb_cont.buff;
 950         cont_seg_hdr->format = CDB_CONTINUATION_FORMAT_V2;
 951         cont_seg_hdr->service_action = cdbh->varlen_cdb.service_action;
 952
 953         /* create a bio for continuation segment */
 954         bio = bio_map_kern(req_q, or->cdb_cont.buff, or->cdb_cont.total_bytes,
 955                            GFP_KERNEL);
 956         if (IS_ERR(bio))
 957                 return PTR_ERR(bio);
 958
 959         bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 960
 961         /* integrity check the continuation before the bio is linked
 962          * with the other data segments since the continuation
 963          * integrity is separate from the other data segments.
 964          */
 965         osd_sec_sign_data(cont_seg_hdr->integrity_check, bio, cap_key);
 966
 967         cdbh->v2.cdb_continuation_length = cpu_to_be32(or->cdb_cont.total_bytes);
 968
 969         /* we can't use _req_append_segment, because we need to link in the
 970          * continuation bio to the head of the bio list - the
 971          * continuation segment (if it exists) is always the first segment in
 972          * the out data buffer.
 973          */
 974         bio->bi_next = or->out.bio;
 975         or->out.bio = bio;
 976         or->out.total_bytes += or->cdb_cont.total_bytes;
 977
 978         return 0;
 979 }
 980
 981 /* osd_req_write_sg: Takes a @bio that points to the data out buffer and an
 982  * @sglist that has the scatter gather entries. Scatter-gather enables a write
 983  * of multiple none-contiguous areas of an object, in a single call. The extents
 984  * may overlap and/or be in any order. The only constrain is that:
 985  *      total_bytes(sglist) >= total_bytes(bio)
 986  */
 987 int osd_req_write_sg(struct osd_request *or,
 988         const struct osd_obj_id *obj, struct bio *bio,
 989         const struct osd_sg_entry *sglist, unsigned numentries)
 990 {
 991         u64 len;
 992         int ret = _add_sg_continuation_descriptor(or, sglist, numentries, &len);
 993
 994         if (ret)
 995                 return ret;
 996         osd_req_write(or, obj, 0, bio, len);
 997
 998         return 0;
 999 }
1000 EXPORT_SYMBOL(osd_req_write_sg);
1001
1002 /* osd_req_read_sg: Read multiple extents of an object into @bio
1003  * See osd_req_write_sg
1004  */
1005 int osd_req_read_sg(struct osd_request *or,
1006         const struct osd_obj_id *obj, struct bio *bio,
1007         const struct osd_sg_entry *sglist, unsigned numentries)
1008 {
1009         u64 len;
1010         u64 off;
1011         int ret;
1012
1013         if (numentries > 1) {
1014                 off = 0;
1015                 ret = _add_sg_continuation_descriptor(or, sglist, numentries,
1016                                                       &len);
1017                 if (ret)
1018                         return ret;
1019         } else {
1020                 /* Optimize the case of single segment, read_sg is a
1021                  * bidi operation.
1022                  */
1023                 len = sglist->len;
1024                 off = sglist->offset;
1025         }
1026         osd_req_read(or, obj, off, bio, len);
1027
1028         return 0;
1029 }
1030 EXPORT_SYMBOL(osd_req_read_sg);
1031
1032 /* SG-list write/read Kern API
1033  *
1034  * osd_req_{write,read}_sg_kern takes an array of @buff pointers and an array
1035  * of sg_entries. @numentries indicates how many pointers and sg_entries there
1036  * are.  By requiring an array of buff pointers. This allows a caller to do a
1037  * single write/read and scatter into multiple buffers.
1038  * NOTE: Each buffer + len should not cross a page boundary.
1039  */
1040 static struct bio *_create_sg_bios(struct osd_request *or,
1041         void **buff, const struct osd_sg_entry *sglist, unsigned numentries)
1042 {
1043         struct request_queue *q = osd_request_queue(or->osd_dev);
1044         struct bio *bio;
1045         unsigned i;
1046
1047         bio = bio_kmalloc(GFP_KERNEL, numentries);
1048         if (unlikely(!bio)) {
1049                 OSD_DEBUG("Failed to allocate BIO size=%u\n", numentries);
1050                 return ERR_PTR(-ENOMEM);
1051         }
1052
1053         for (i = 0; i < numentries; i++) {
1054                 unsigned offset = offset_in_page(buff[i]);
1055                 struct page *page = virt_to_page(buff[i]);
1056                 unsigned len = sglist[i].len;
1057                 unsigned added_len;
1058
1059                 BUG_ON(offset + len > PAGE_SIZE);
1060                 added_len = bio_add_pc_page(q, bio, page, len, offset);
1061                 if (unlikely(len != added_len)) {
1062                         OSD_DEBUG("bio_add_pc_page len(%d) != added_len(%d)\n",
1063                                   len, added_len);
1064                         bio_put(bio);
1065                         return ERR_PTR(-ENOMEM);
1066                 }
1067         }
1068
1069         return bio;
1070 }
1071
1072 int osd_req_write_sg_kern(struct osd_request *or,
1073         const struct osd_obj_id *obj, void **buff,
1074         const struct osd_sg_entry *sglist, unsigned numentries)
1075 {
1076         struct bio *bio = _create_sg_bios(or, buff, sglist, numentries);
1077         if (IS_ERR(bio))
1078                 return PTR_ERR(bio);
1079
1080         bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
1081         osd_req_write_sg(or, obj, bio, sglist, numentries);
1082
1083         return 0;
1084 }
1085 EXPORT_SYMBOL(osd_req_write_sg_kern);
1086
1087 int osd_req_read_sg_kern(struct osd_request *or,
1088         const struct osd_obj_id *obj, void **buff,
1089         const struct osd_sg_entry *sglist, unsigned numentries)
1090 {
1091         struct bio *bio = _create_sg_bios(or, buff, sglist, numentries);
1092         if (IS_ERR(bio))
1093                 return PTR_ERR(bio);
1094
1095         osd_req_read_sg(or, obj, bio, sglist, numentries);
1096
1097         return 0;
1098 }
1099 EXPORT_SYMBOL(osd_req_read_sg_kern);
1100
1101
1102
1103 void osd_req_get_attributes(struct osd_request *or,
1104         const struct osd_obj_id *obj)
1105 {
1106         _osd_req_encode_common(or, OSD_ACT_GET_ATTRIBUTES, obj, 0, 0);
1107 }
1108 EXPORT_SYMBOL(osd_req_get_attributes);
1109
1110 void osd_req_set_attributes(struct osd_request *or,
1111         const struct osd_obj_id *obj)
1112 {
1113         _osd_req_encode_common(or, OSD_ACT_SET_ATTRIBUTES, obj, 0, 0);
1114 }
1115 EXPORT_SYMBOL(osd_req_set_attributes);
1116
1117 /*
1118  * Attributes List-mode
1119  */
1120
1121 int osd_req_add_set_attr_list(struct osd_request *or,
1122         const struct osd_attr *oa, unsigned nelem)
1123 {
1124         unsigned total_bytes = or->set_attr.total_bytes;
1125         void *attr_last;
1126         int ret;
1127
1128         if (or->attributes_mode &&
1129             or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
1130                 WARN_ON(1);
1131                 return -EINVAL;
1132         }
1133         or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1134
1135         if (!total_bytes) { /* first-time: allocate and put list header */
1136                 total_bytes = _osd_req_sizeof_alist_header(or);
1137                 ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
1138                 if (ret)
1139                         return ret;
1140                 _osd_req_set_alist_type(or, or->set_attr.buff,
1141                                         OSD_ATTR_LIST_SET_RETRIEVE);
1142         }
1143         attr_last = or->set_attr.buff + total_bytes;
1144
1145         for (; nelem; --nelem) {
1146                 unsigned elem_size = _osd_req_alist_elem_size(or, oa->len);
1147
1148                 total_bytes += elem_size;
1149                 if (unlikely(or->set_attr.alloc_size < total_bytes)) {
1150                         or->set_attr.total_bytes = total_bytes - elem_size;
1151                         ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
1152                         if (ret)
1153                                 return ret;
1154                         attr_last =
1155                                 or->set_attr.buff + or->set_attr.total_bytes;
1156                 }
1157
1158                 _osd_req_alist_elem_encode(or, attr_last, oa);
1159
1160                 attr_last += elem_size;
1161                 ++oa;
1162         }
1163
1164         or->set_attr.total_bytes = total_bytes;
1165         return 0;
1166 }
1167 EXPORT_SYMBOL(osd_req_add_set_attr_list);
1168
1169 static int _req_append_segment(struct osd_request *or,
1170         unsigned padding, struct _osd_req_data_segment *seg,
1171         struct _osd_req_data_segment *last_seg, struct _osd_io_info *io)
1172 {
1173         void *pad_buff;
1174         int ret;
1175
1176         if (padding) {
1177                 /* check if we can just add it to last buffer */
1178                 if (last_seg &&
1179                     (padding <= last_seg->alloc_size - last_seg->total_bytes))
1180                         pad_buff = last_seg->buff + last_seg->total_bytes;
1181                 else
1182                         pad_buff = io->pad_buff;
1183
1184                 ret = blk_rq_map_kern(io->req->q, io->req, pad_buff, padding,
1185                                        or->alloc_flags);
1186                 if (ret)
1187                         return ret;
1188                 io->total_bytes += padding;
1189         }
1190
1191         ret = blk_rq_map_kern(io->req->q, io->req, seg->buff, seg->total_bytes,
1192                                or->alloc_flags);
1193         if (ret)
1194                 return ret;
1195
1196         io->total_bytes += seg->total_bytes;
1197         OSD_DEBUG("padding=%d buff=%p total_bytes=%d\n", padding, seg->buff,
1198                   seg->total_bytes);
1199         return 0;
1200 }
1201
1202 static int _osd_req_finalize_set_attr_list(struct osd_request *or)
1203 {
1204         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1205         unsigned padding;
1206         int ret;
1207
1208         if (!or->set_attr.total_bytes) {
1209                 cdbh->attrs_list.set_attr_offset = OSD_OFFSET_UNUSED;
1210                 return 0;
1211         }
1212
1213         cdbh->attrs_list.set_attr_bytes = cpu_to_be32(or->set_attr.total_bytes);
1214         cdbh->attrs_list.set_attr_offset =
1215                 osd_req_encode_offset(or, or->out.total_bytes, &padding);
1216
1217         ret = _req_append_segment(or, padding, &or->set_attr,
1218                                   or->out.last_seg, &or->out);
1219         if (ret)
1220                 return ret;
1221
1222         or->out.last_seg = &or->set_attr;
1223         return 0;
1224 }
1225
1226 int osd_req_add_get_attr_list(struct osd_request *or,
1227         const struct osd_attr *oa, unsigned nelem)
1228 {
1229         unsigned total_bytes = or->enc_get_attr.total_bytes;
1230         void *attr_last;
1231         int ret;
1232
1233         if (or->attributes_mode &&
1234             or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
1235                 WARN_ON(1);
1236                 return -EINVAL;
1237         }
1238         or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1239
1240         /* first time calc data-in list header size */
1241         if (!or->get_attr.total_bytes)
1242                 or->get_attr.total_bytes = _osd_req_sizeof_alist_header(or);
1243
1244         /* calc data-out info */
1245         if (!total_bytes) { /* first-time: allocate and put list header */
1246                 unsigned max_bytes;
1247
1248                 total_bytes = _osd_req_sizeof_alist_header(or);
1249                 max_bytes = total_bytes +
1250                         nelem * sizeof(struct osd_attributes_list_attrid);
1251                 ret = _alloc_get_attr_desc(or, max_bytes);
1252                 if (ret)
1253                         return ret;
1254
1255                 _osd_req_set_alist_type(or, or->enc_get_attr.buff,
1256                                         OSD_ATTR_LIST_GET);
1257         }
1258         attr_last = or->enc_get_attr.buff + total_bytes;
1259
1260         for (; nelem; --nelem) {
1261                 struct osd_attributes_list_attrid *attrid;
1262                 const unsigned cur_size = sizeof(*attrid);
1263
1264                 total_bytes += cur_size;
1265                 if (unlikely(or->enc_get_attr.alloc_size < total_bytes)) {
1266                         or->enc_get_attr.total_bytes = total_bytes - cur_size;
1267                         ret = _alloc_get_attr_desc(or,
1268                                         total_bytes + nelem * sizeof(*attrid));
1269                         if (ret)
1270                                 return ret;
1271                         attr_last = or->enc_get_attr.buff +
1272                                 or->enc_get_attr.total_bytes;
1273                 }
1274
1275                 attrid = attr_last;
1276                 attrid->attr_page = cpu_to_be32(oa->attr_page);
1277                 attrid->attr_id = cpu_to_be32(oa->attr_id);
1278
1279                 attr_last += cur_size;
1280
1281                 /* calc data-in size */
1282                 or->get_attr.total_bytes +=
1283                         _osd_req_alist_elem_size(or, oa->len);
1284                 ++oa;
1285         }
1286
1287         or->enc_get_attr.total_bytes = total_bytes;
1288
1289         OSD_DEBUG(
1290                "get_attr.total_bytes=%u(%u) enc_get_attr.total_bytes=%u(%Zu)\n",
1291                or->get_attr.total_bytes,
1292                or->get_attr.total_bytes - _osd_req_sizeof_alist_header(or),
1293                or->enc_get_attr.total_bytes,
1294                (or->enc_get_attr.total_bytes - _osd_req_sizeof_alist_header(or))
1295                         / sizeof(struct osd_attributes_list_attrid));
1296
1297         return 0;
1298 }
1299 EXPORT_SYMBOL(osd_req_add_get_attr_list);
1300
1301 static int _osd_req_finalize_get_attr_list(struct osd_request *or)
1302 {
1303         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1304         unsigned out_padding;
1305         unsigned in_padding;
1306         int ret;
1307
1308         if (!or->enc_get_attr.total_bytes) {
1309                 cdbh->attrs_list.get_attr_desc_offset = OSD_OFFSET_UNUSED;
1310                 cdbh->attrs_list.get_attr_offset = OSD_OFFSET_UNUSED;
1311                 return 0;
1312         }
1313
1314         ret = _alloc_get_attr_list(or);
1315         if (ret)
1316                 return ret;
1317
1318         /* The out-going buffer info update */
1319         OSD_DEBUG("out-going\n");
1320         cdbh->attrs_list.get_attr_desc_bytes =
1321                 cpu_to_be32(or->enc_get_attr.total_bytes);
1322
1323         cdbh->attrs_list.get_attr_desc_offset =
1324                 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1325
1326         ret = _req_append_segment(or, out_padding, &or->enc_get_attr,
1327                                   or->out.last_seg, &or->out);
1328         if (ret)
1329                 return ret;
1330         or->out.last_seg = &or->enc_get_attr;
1331
1332         /* The incoming buffer info update */
1333         OSD_DEBUG("in-coming\n");
1334         cdbh->attrs_list.get_attr_alloc_length =
1335                 cpu_to_be32(or->get_attr.total_bytes);
1336
1337         cdbh->attrs_list.get_attr_offset =
1338                 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1339
1340         ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1341                                   &or->in);
1342         if (ret)
1343                 return ret;
1344         or->in.last_seg = &or->get_attr;
1345
1346         return 0;
1347 }
1348
1349 int osd_req_decode_get_attr_list(struct osd_request *or,
1350         struct osd_attr *oa, int *nelem, void **iterator)
1351 {
1352         unsigned cur_bytes, returned_bytes;
1353         int n;
1354         const unsigned sizeof_attr_list = _osd_req_sizeof_alist_header(or);
1355         void *cur_p;
1356
1357         if (!_osd_req_is_alist_type(or, or->get_attr.buff,
1358                                     OSD_ATTR_LIST_SET_RETRIEVE)) {
1359                 oa->attr_page = 0;
1360                 oa->attr_id = 0;
1361                 oa->val_ptr = NULL;
1362                 oa->len = 0;
1363                 *iterator = NULL;
1364                 return 0;
1365         }
1366
1367         if (*iterator) {
1368                 BUG_ON((*iterator < or->get_attr.buff) ||
1369                      (or->get_attr.buff + or->get_attr.alloc_size < *iterator));
1370                 cur_p = *iterator;
1371                 cur_bytes = (*iterator - or->get_attr.buff) - sizeof_attr_list;
1372                 returned_bytes = or->get_attr.total_bytes;
1373         } else { /* first time decode the list header */
1374                 cur_bytes = sizeof_attr_list;
1375                 returned_bytes = _osd_req_alist_size(or, or->get_attr.buff) +
1376                                         sizeof_attr_list;
1377
1378                 cur_p = or->get_attr.buff + sizeof_attr_list;
1379
1380                 if (returned_bytes > or->get_attr.alloc_size) {
1381                         OSD_DEBUG("target report: space was not big enough! "
1382                                   "Allocate=%u Needed=%u\n",
1383                                   or->get_attr.alloc_size,
1384                                   returned_bytes + sizeof_attr_list);
1385
1386                         returned_bytes =
1387                                 or->get_attr.alloc_size - sizeof_attr_list;
1388                 }
1389                 or->get_attr.total_bytes = returned_bytes;
1390         }
1391
1392         for (n = 0; (n < *nelem) && (cur_bytes < returned_bytes); ++n) {
1393                 int inc = _osd_req_alist_elem_decode(or, cur_p, oa,
1394                                                  returned_bytes - cur_bytes);
1395
1396                 if (inc < 0) {
1397                         OSD_ERR("BAD FOOD from target. list not valid!"
1398                                 "c=%d r=%d n=%d\n",
1399                                 cur_bytes, returned_bytes, n);
1400                         oa->val_ptr = NULL;
1401                         cur_bytes = returned_bytes; /* break the caller loop */
1402                         break;
1403                 }
1404
1405                 cur_bytes += inc;
1406                 cur_p += inc;
1407                 ++oa;
1408         }
1409
1410         *iterator = (returned_bytes - cur_bytes) ? cur_p : NULL;
1411         *nelem = n;
1412         return returned_bytes - cur_bytes;
1413 }
1414 EXPORT_SYMBOL(osd_req_decode_get_attr_list);
1415
1416 /*
1417  * Attributes Page-mode
1418  */
1419
1420 int osd_req_add_get_attr_page(struct osd_request *or,
1421         u32 page_id, void *attar_page, unsigned max_page_len,
1422         const struct osd_attr *set_one_attr)
1423 {
1424         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1425
1426         if (or->attributes_mode &&
1427             or->attributes_mode != OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1428                 WARN_ON(1);
1429                 return -EINVAL;
1430         }
1431         or->attributes_mode = OSD_CDB_GET_ATTR_PAGE_SET_ONE;
1432
1433         or->get_attr.buff = attar_page;
1434         or->get_attr.total_bytes = max_page_len;
1435
1436         cdbh->attrs_page.get_attr_page = cpu_to_be32(page_id);
1437         cdbh->attrs_page.get_attr_alloc_length = cpu_to_be32(max_page_len);
1438
1439         if (!set_one_attr || !set_one_attr->attr_page)
1440                 return 0; /* The set is optional */
1441
1442         or->set_attr.buff = set_one_attr->val_ptr;
1443         or->set_attr.total_bytes = set_one_attr->len;
1444
1445         cdbh->attrs_page.set_attr_page = cpu_to_be32(set_one_attr->attr_page);
1446         cdbh->attrs_page.set_attr_id = cpu_to_be32(set_one_attr->attr_id);
1447         cdbh->attrs_page.set_attr_length = cpu_to_be32(set_one_attr->len);
1448         return 0;
1449 }
1450 EXPORT_SYMBOL(osd_req_add_get_attr_page);
1451
1452 static int _osd_req_finalize_attr_page(struct osd_request *or)
1453 {
1454         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1455         unsigned in_padding, out_padding;
1456         int ret;
1457
1458         /* returned page */
1459         cdbh->attrs_page.get_attr_offset =
1460                 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1461
1462         ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1463                                   &or->in);
1464         if (ret)
1465                 return ret;
1466
1467         if (or->set_attr.total_bytes == 0)
1468                 return 0;
1469
1470         /* set one value */
1471         cdbh->attrs_page.set_attr_offset =
1472                 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1473
1474         ret = _req_append_segment(or, out_padding, &or->set_attr, NULL,
1475                                   &or->out);
1476         return ret;
1477 }
1478
1479 static inline void osd_sec_parms_set_out_offset(bool is_v1,
1480         struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
1481 {
1482         if (is_v1)
1483                 sec_parms->v1.data_out_integrity_check_offset = offset;
1484         else
1485                 sec_parms->v2.data_out_integrity_check_offset = offset;
1486 }
1487
1488 static inline void osd_sec_parms_set_in_offset(bool is_v1,
1489         struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
1490 {
1491         if (is_v1)
1492                 sec_parms->v1.data_in_integrity_check_offset = offset;
1493         else
1494                 sec_parms->v2.data_in_integrity_check_offset = offset;
1495 }
1496
1497 static int _osd_req_finalize_data_integrity(struct osd_request *or,
1498         bool has_in, bool has_out, struct bio *out_data_bio, u64 out_data_bytes,
1499         const u8 *cap_key)
1500 {
1501         struct osd_security_parameters *sec_parms = _osd_req_sec_params(or);
1502         int ret;
1503
1504         if (!osd_is_sec_alldata(sec_parms))
1505                 return 0;
1506
1507         if (has_out) {
1508                 struct _osd_req_data_segment seg = {
1509                         .buff = &or->out_data_integ,
1510                         .total_bytes = sizeof(or->out_data_integ),
1511                 };
1512                 unsigned pad;
1513
1514                 or->out_data_integ.data_bytes = cpu_to_be64(out_data_bytes);
1515                 or->out_data_integ.set_attributes_bytes = cpu_to_be64(
1516                         or->set_attr.total_bytes);
1517                 or->out_data_integ.get_attributes_bytes = cpu_to_be64(
1518                         or->enc_get_attr.total_bytes);
1519
1520                 osd_sec_parms_set_out_offset(osd_req_is_ver1(or), sec_parms,
1521                         osd_req_encode_offset(or, or->out.total_bytes, &pad));
1522
1523                 ret = _req_append_segment(or, pad, &seg, or->out.last_seg,
1524                                           &or->out);
1525                 if (ret)
1526                         return ret;
1527                 or->out.last_seg = NULL;
1528
1529                 /* they are now all chained to request sign them all together */
1530                 osd_sec_sign_data(&or->out_data_integ, out_data_bio,
1531                                   cap_key);
1532         }
1533
1534         if (has_in) {
1535                 struct _osd_req_data_segment seg = {
1536                         .buff = &or->in_data_integ,
1537                         .total_bytes = sizeof(or->in_data_integ),
1538                 };
1539                 unsigned pad;
1540
1541                 osd_sec_parms_set_in_offset(osd_req_is_ver1(or), sec_parms,
1542                         osd_req_encode_offset(or, or->in.total_bytes, &pad));
1543
1544                 ret = _req_append_segment(or, pad, &seg, or->in.last_seg,
1545                                           &or->in);
1546                 if (ret)
1547                         return ret;
1548
1549                 or->in.last_seg = NULL;
1550         }
1551
1552         return 0;
1553 }
1554
1555 /*
1556  * osd_finalize_request and helpers
1557  */
1558 static struct request *_make_request(struct request_queue *q, bool has_write,
1559                               struct _osd_io_info *oii, gfp_t flags)
1560 {
1561         if (oii->bio)
1562                 return blk_make_request(q, oii->bio, flags);
1563         else {
1564                 struct request *req;
1565
1566                 req = blk_get_request(q, has_write ? WRITE : READ, flags);
1567                 if (IS_ERR(req))
1568                         return req;
1569
1570                 blk_rq_set_block_pc(req);
1571                 return req;
1572         }
1573 }
1574
1575 static int _init_blk_request(struct osd_request *or,
1576         bool has_in, bool has_out)
1577 {
1578         gfp_t flags = or->alloc_flags;
1579         struct scsi_device *scsi_device = or->osd_dev->scsi_device;
1580         struct request_queue *q = scsi_device->request_queue;
1581         struct request *req;
1582         int ret;
1583
1584         req = _make_request(q, has_out, has_out ? &or->out : &or->in, flags);
1585         if (IS_ERR(req)) {
1586                 ret = PTR_ERR(req);
1587                 goto out;
1588         }
1589
1590         or->request = req;
1591         req->cmd_flags |= REQ_QUIET;
1592
1593         req->timeout = or->timeout;
1594         req->retries = or->retries;
1595         req->sense = or->sense;
1596         req->sense_len = 0;
1597
1598         if (has_out) {
1599                 or->out.req = req;
1600                 if (has_in) {
1601                         /* allocate bidi request */
1602                         req = _make_request(q, false, &or->in, flags);
1603                         if (IS_ERR(req)) {
1604                                 OSD_DEBUG("blk_get_request for bidi failed\n");
1605                                 ret = PTR_ERR(req);
1606                                 goto out;
1607                         }
1608                         blk_rq_set_block_pc(req);
1609                         or->in.req = or->request->next_rq = req;
1610                 }
1611         } else if (has_in)
1612                 or->in.req = req;
1613
1614         ret = 0;
1615 out:
1616         OSD_DEBUG("or=%p has_in=%d has_out=%d => %d, %p\n",
1617                         or, has_in, has_out, ret, or->request);
1618         return ret;
1619 }
1620
1621 int osd_finalize_request(struct osd_request *or,
1622         u8 options, const void *cap, const u8 *cap_key)
1623 {
1624         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1625         bool has_in, has_out;
1626          /* Save for data_integrity without the cdb_continuation */
1627         struct bio *out_data_bio = or->out.bio;
1628         u64 out_data_bytes = or->out.total_bytes;
1629         int ret;
1630
1631         if (options & OSD_REQ_FUA)
1632                 cdbh->options |= OSD_CDB_FUA;
1633
1634         if (options & OSD_REQ_DPO)
1635                 cdbh->options |= OSD_CDB_DPO;
1636
1637         if (options & OSD_REQ_BYPASS_TIMESTAMPS)
1638                 cdbh->timestamp_control = OSD_CDB_BYPASS_TIMESTAMPS;
1639
1640         osd_set_caps(&or->cdb, cap);
1641
1642         has_in = or->in.bio || or->get_attr.total_bytes;
1643         has_out = or->out.bio || or->cdb_cont.total_bytes ||
1644                 or->set_attr.total_bytes || or->enc_get_attr.total_bytes;
1645
1646         ret = _osd_req_finalize_cdb_cont(or, cap_key);
1647         if (ret) {
1648                 OSD_DEBUG("_osd_req_finalize_cdb_cont failed\n");
1649                 return ret;
1650         }
1651         ret = _init_blk_request(or, has_in, has_out);
1652         if (ret) {
1653                 OSD_DEBUG("_init_blk_request failed\n");
1654                 return ret;
1655         }
1656
1657         or->out.pad_buff = sg_out_pad_buffer;
1658         or->in.pad_buff = sg_in_pad_buffer;
1659
1660         if (!or->attributes_mode)
1661                 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1662         cdbh->command_specific_options |= or->attributes_mode;
1663         if (or->attributes_mode == OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1664                 ret = _osd_req_finalize_attr_page(or);
1665                 if (ret) {
1666                         OSD_DEBUG("_osd_req_finalize_attr_page failed\n");
1667                         return ret;
1668                 }
1669         } else {
1670                 /* TODO: I think that for the GET_ATTR command these 2 should
1671                  * be reversed to keep them in execution order (for embeded
1672                  * targets with low memory footprint)
1673                  */
1674                 ret = _osd_req_finalize_set_attr_list(or);
1675                 if (ret) {
1676                         OSD_DEBUG("_osd_req_finalize_set_attr_list failed\n");
1677                         return ret;
1678                 }
1679
1680                 ret = _osd_req_finalize_get_attr_list(or);
1681                 if (ret) {
1682                         OSD_DEBUG("_osd_req_finalize_get_attr_list failed\n");
1683                         return ret;
1684                 }
1685         }
1686
1687         ret = _osd_req_finalize_data_integrity(or, has_in, has_out,
1688                                                out_data_bio, out_data_bytes,
1689                                                cap_key);
1690         if (ret)
1691                 return ret;
1692
1693         osd_sec_sign_cdb(&or->cdb, cap_key);
1694
1695         or->request->cmd = or->cdb.buff;
1696         or->request->cmd_len = _osd_req_cdb_len(or);
1697
1698         return 0;
1699 }
1700 EXPORT_SYMBOL(osd_finalize_request);
1701
1702 static bool _is_osd_security_code(int code)
1703 {
1704         return  (code == osd_security_audit_value_frozen) ||
1705                 (code == osd_security_working_key_frozen) ||
1706                 (code == osd_nonce_not_unique) ||
1707                 (code == osd_nonce_timestamp_out_of_range) ||
1708                 (code == osd_invalid_dataout_buffer_integrity_check_value);
1709 }
1710
1711 #define OSD_SENSE_PRINT1(fmt, a...) \
1712         do { \
1713                 if (__cur_sense_need_output) \
1714                         OSD_ERR(fmt, ##a); \
1715         } while (0)
1716
1717 #define OSD_SENSE_PRINT2(fmt, a...) OSD_SENSE_PRINT1("    " fmt, ##a)
1718
1719 int osd_req_decode_sense_full(struct osd_request *or,
1720         struct osd_sense_info *osi, bool silent,
1721         struct osd_obj_id *bad_obj_list __unused, int max_obj __unused,
1722         struct osd_attr *bad_attr_list, int max_attr)
1723 {
1724         int sense_len, original_sense_len;
1725         struct osd_sense_info local_osi;
1726         struct scsi_sense_descriptor_based *ssdb;
1727         void *cur_descriptor;
1728 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 0)
1729         const bool __cur_sense_need_output = false;
1730 #else
1731         bool __cur_sense_need_output = !silent;
1732 #endif
1733         int ret;
1734
1735         if (likely(!or->req_errors))
1736                 return 0;
1737
1738         osi = osi ? : &local_osi;
1739         memset(osi, 0, sizeof(*osi));
1740
1741         ssdb = (typeof(ssdb))or->sense;
1742         sense_len = or->sense_len;
1743         if ((sense_len < (int)sizeof(*ssdb) || !ssdb->sense_key)) {
1744                 OSD_ERR("Block-layer returned error(0x%x) but "
1745                         "sense_len(%u) || key(%d) is empty\n",
1746                         or->req_errors, sense_len, ssdb->sense_key);
1747                 goto analyze;
1748         }
1749
1750         if ((ssdb->response_code != 0x72) && (ssdb->response_code != 0x73)) {
1751                 OSD_ERR("Unrecognized scsi sense: rcode=%x length=%d\n",
1752                         ssdb->response_code, sense_len);
1753                 goto analyze;
1754         }
1755
1756         osi->key = ssdb->sense_key;
1757         osi->additional_code = be16_to_cpu(ssdb->additional_sense_code);
1758         original_sense_len = ssdb->additional_sense_length + 8;
1759
1760 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 1)
1761         if (__cur_sense_need_output)
1762                 __cur_sense_need_output = (osi->key > scsi_sk_recovered_error);
1763 #endif
1764         OSD_SENSE_PRINT1("Main Sense information key=0x%x length(%d, %d) "
1765                         "additional_code=0x%x async_error=%d errors=0x%x\n",
1766                         osi->key, original_sense_len, sense_len,
1767                         osi->additional_code, or->async_error,
1768                         or->req_errors);
1769
1770         if (original_sense_len < sense_len)
1771                 sense_len = original_sense_len;
1772
1773         cur_descriptor = ssdb->ssd;
1774         sense_len -= sizeof(*ssdb);
1775         while (sense_len > 0) {
1776                 struct scsi_sense_descriptor *ssd = cur_descriptor;
1777                 int cur_len = ssd->additional_length + 2;
1778
1779                 sense_len -= cur_len;
1780
1781                 if (sense_len < 0)
1782                         break; /* sense was truncated */
1783
1784                 switch (ssd->descriptor_type) {
1785                 case scsi_sense_information:
1786                 case scsi_sense_command_specific_information:
1787                 {
1788                         struct scsi_sense_command_specific_data_descriptor
1789                                 *sscd = cur_descriptor;
1790
1791                         osi->command_info =
1792                                 get_unaligned_be64(&sscd->information) ;
1793                         OSD_SENSE_PRINT2(
1794                                 "command_specific_information 0x%llx \n",
1795                                 _LLU(osi->command_info));
1796                         break;
1797                 }
1798                 case scsi_sense_key_specific:
1799                 {
1800                         struct scsi_sense_key_specific_data_descriptor
1801                                 *ssks = cur_descriptor;
1802
1803                         osi->sense_info = get_unaligned_be16(&ssks->value);
1804                         OSD_SENSE_PRINT2(
1805                                 "sense_key_specific_information %u"
1806                                 "sksv_cd_bpv_bp (0x%x)\n",
1807                                 osi->sense_info, ssks->sksv_cd_bpv_bp);
1808                         break;
1809                 }
1810                 case osd_sense_object_identification:
1811                 { /*FIXME: Keep first not last, Store in array*/
1812                         struct osd_sense_identification_data_descriptor
1813                                 *osidd = cur_descriptor;
1814
1815                         osi->not_initiated_command_functions =
1816                                 le32_to_cpu(osidd->not_initiated_functions);
1817                         osi->completed_command_functions =
1818                                 le32_to_cpu(osidd->completed_functions);
1819                         osi->obj.partition = be64_to_cpu(osidd->partition_id);
1820                         osi->obj.id = be64_to_cpu(osidd->object_id);
1821                         OSD_SENSE_PRINT2(
1822                                 "object_identification pid=0x%llx oid=0x%llx\n",
1823                                 _LLU(osi->obj.partition), _LLU(osi->obj.id));
1824                         OSD_SENSE_PRINT2(
1825                                 "not_initiated_bits(%x) "
1826                                 "completed_command_bits(%x)\n",
1827                                 osi->not_initiated_command_functions,
1828                                 osi->completed_command_functions);
1829                         break;
1830                 }
1831                 case osd_sense_response_integrity_check:
1832                 {
1833                         struct osd_sense_response_integrity_check_descriptor
1834                                 *osricd = cur_descriptor;
1835                         const unsigned len =
1836                                           sizeof(osricd->integrity_check_value);
1837                         char key_dump[len*4 + 2]; /* 2nibbles+space+ASCII */
1838
1839                         hex_dump_to_buffer(osricd->integrity_check_value, len,
1840                                        32, 1, key_dump, sizeof(key_dump), true);
1841                         OSD_SENSE_PRINT2("response_integrity [%s]\n", key_dump);
1842                 }
1843                 case osd_sense_attribute_identification:
1844                 {
1845                         struct osd_sense_attributes_data_descriptor
1846                                 *osadd = cur_descriptor;
1847                         unsigned len = min(cur_len, sense_len);
1848                         struct osd_sense_attr *pattr = osadd->sense_attrs;
1849
1850                         while (len >= sizeof(*pattr)) {
1851                                 u32 attr_page = be32_to_cpu(pattr->attr_page);
1852                                 u32 attr_id = be32_to_cpu(pattr->attr_id);
1853
1854                                 if (!osi->attr.attr_page) {
1855                                         osi->attr.attr_page = attr_page;
1856                                         osi->attr.attr_id = attr_id;
1857                                 }
1858
1859                                 if (bad_attr_list && max_attr) {
1860                                         bad_attr_list->attr_page = attr_page;
1861                                         bad_attr_list->attr_id = attr_id;
1862                                         bad_attr_list++;
1863                                         max_attr--;
1864                                 }
1865
1866                                 len -= sizeof(*pattr);
1867                                 OSD_SENSE_PRINT2(
1868                                         "osd_sense_attribute_identification"
1869                                         "attr_page=0x%x attr_id=0x%x\n",
1870                                         attr_page, attr_id);
1871                         }
1872                 }
1873                 /*These are not legal for OSD*/
1874                 case scsi_sense_field_replaceable_unit:
1875                         OSD_SENSE_PRINT2("scsi_sense_field_replaceable_unit\n");
1876                         break;
1877                 case scsi_sense_stream_commands:
1878                         OSD_SENSE_PRINT2("scsi_sense_stream_commands\n");
1879                         break;
1880                 case scsi_sense_block_commands:
1881                         OSD_SENSE_PRINT2("scsi_sense_block_commands\n");
1882                         break;
1883                 case scsi_sense_ata_return:
1884                         OSD_SENSE_PRINT2("scsi_sense_ata_return\n");
1885                         break;
1886                 default:
1887                         if (ssd->descriptor_type <= scsi_sense_Reserved_last)
1888                                 OSD_SENSE_PRINT2(
1889                                         "scsi_sense Reserved descriptor (0x%x)",
1890                                         ssd->descriptor_type);
1891                         else
1892                                 OSD_SENSE_PRINT2(
1893                                         "scsi_sense Vendor descriptor (0x%x)",
1894                                         ssd->descriptor_type);
1895                 }
1896
1897                 cur_descriptor += cur_len;
1898         }
1899
1900 analyze:
1901         if (!osi->key) {
1902                 /* scsi sense is Empty, the request was never issued to target
1903                  * linux return code might tell us what happened.
1904                  */
1905                 if (or->async_error == -ENOMEM)
1906                         osi->osd_err_pri = OSD_ERR_PRI_RESOURCE;
1907                 else
1908                         osi->osd_err_pri = OSD_ERR_PRI_UNREACHABLE;
1909                 ret = or->async_error;
1910         } else if (osi->key <= scsi_sk_recovered_error) {
1911                 osi->osd_err_pri = 0;
1912                 ret = 0;
1913         } else if (osi->additional_code == scsi_invalid_field_in_cdb) {
1914                 if (osi->cdb_field_offset == OSD_CFO_STARTING_BYTE) {
1915                         osi->osd_err_pri = OSD_ERR_PRI_CLEAR_PAGES;
1916                         ret = -EFAULT; /* caller should recover from this */
1917                 } else if (osi->cdb_field_offset == OSD_CFO_OBJECT_ID) {
1918                         osi->osd_err_pri = OSD_ERR_PRI_NOT_FOUND;
1919                         ret = -ENOENT;
1920                 } else if (osi->cdb_field_offset == OSD_CFO_PERMISSIONS) {
1921                         osi->osd_err_pri = OSD_ERR_PRI_NO_ACCESS;
1922                         ret = -EACCES;
1923                 } else {
1924                         osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED;
1925                         ret = -EINVAL;
1926                 }
1927         } else if (osi->additional_code == osd_quota_error) {
1928                 osi->osd_err_pri = OSD_ERR_PRI_NO_SPACE;
1929                 ret = -ENOSPC;
1930         } else if (_is_osd_security_code(osi->additional_code)) {
1931                 osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED;
1932                 ret = -EINVAL;
1933         } else {
1934                 osi->osd_err_pri = OSD_ERR_PRI_EIO;
1935                 ret = -EIO;
1936         }
1937
1938         if (!or->out.residual)
1939                 or->out.residual = or->out.total_bytes;
1940         if (!or->in.residual)
1941                 or->in.residual = or->in.total_bytes;
1942
1943         return ret;
1944 }
1945 EXPORT_SYMBOL(osd_req_decode_sense_full);
1946
1947 /*
1948  * Implementation of osd_sec.h API
1949  * TODO: Move to a separate osd_sec.c file at a later stage.
1950  */
1951
1952 enum { OSD_SEC_CAP_V1_ALL_CAPS =
1953         OSD_SEC_CAP_APPEND | OSD_SEC_CAP_OBJ_MGMT | OSD_SEC_CAP_REMOVE   |
1954         OSD_SEC_CAP_CREATE | OSD_SEC_CAP_SET_ATTR | OSD_SEC_CAP_GET_ATTR |
1955         OSD_SEC_CAP_WRITE  | OSD_SEC_CAP_READ     | OSD_SEC_CAP_POL_SEC  |
1956         OSD_SEC_CAP_GLOBAL | OSD_SEC_CAP_DEV_MGMT
1957 };
1958
1959 enum { OSD_SEC_CAP_V2_ALL_CAPS =
1960         OSD_SEC_CAP_V1_ALL_CAPS | OSD_SEC_CAP_QUERY | OSD_SEC_CAP_M_OBJECT
1961 };
1962
1963 void osd_sec_init_nosec_doall_caps(void *caps,
1964         const struct osd_obj_id *obj, bool is_collection, const bool is_v1)
1965 {
1966         struct osd_capability *cap = caps;
1967         u8 type;
1968         u8 descriptor_type;
1969
1970         if (likely(obj->id)) {
1971                 if (unlikely(is_collection)) {
1972                         type = OSD_SEC_OBJ_COLLECTION;
1973                         descriptor_type = is_v1 ? OSD_SEC_OBJ_DESC_OBJ :
1974                                                   OSD_SEC_OBJ_DESC_COL;
1975                 } else {
1976                         type = OSD_SEC_OBJ_USER;
1977                         descriptor_type = OSD_SEC_OBJ_DESC_OBJ;
1978                 }
1979                 WARN_ON(!obj->partition);
1980         } else {
1981                 type = obj->partition ? OSD_SEC_OBJ_PARTITION :
1982                                         OSD_SEC_OBJ_ROOT;
1983                 descriptor_type = OSD_SEC_OBJ_DESC_PAR;
1984         }
1985
1986         memset(cap, 0, sizeof(*cap));
1987
1988         cap->h.format = OSD_SEC_CAP_FORMAT_VER1;
1989         cap->h.integrity_algorithm__key_version = 0; /* MAKE_BYTE(0, 0); */
1990         cap->h.security_method = OSD_SEC_NOSEC;
1991 /*      cap->expiration_time;
1992         cap->AUDIT[30-10];
1993         cap->discriminator[42-30];
1994         cap->object_created_time; */
1995         cap->h.object_type = type;
1996         osd_sec_set_caps(&cap->h, OSD_SEC_CAP_V1_ALL_CAPS);
1997         cap->h.object_descriptor_type = descriptor_type;
1998         cap->od.obj_desc.policy_access_tag = 0;
1999         cap->od.obj_desc.allowed_partition_id = cpu_to_be64(obj->partition);
2000         cap->od.obj_desc.allowed_object_id = cpu_to_be64(obj->id);
2001 }
2002 EXPORT_SYMBOL(osd_sec_init_nosec_doall_caps);
2003
2004 /* FIXME: Extract version from caps pointer.
2005  *        Also Pete's target only supports caps from OSDv1 for now
2006  */
2007 void osd_set_caps(struct osd_cdb *cdb, const void *caps)
2008 {
2009         /* NOTE: They start at same address */
2010         memcpy(&cdb->v1.caps, caps, OSDv1_CAP_LEN);
2011 }
2012
2013 bool osd_is_sec_alldata(struct osd_security_parameters *sec_parms __unused)
2014 {
2015         return false;
2016 }
2017
2018 void osd_sec_sign_cdb(struct osd_cdb *ocdb __unused, const u8 *cap_key __unused)
2019 {
2020 }
2021
2022 void osd_sec_sign_data(void *data_integ __unused,
2023                        struct bio *bio __unused, const u8 *cap_key __unused)
2024 {
2025 }
2026
2027 /*
2028  * Declared in osd_protocol.h
2029  * 4.12.5 Data-In and Data-Out buffer offsets
2030  * byte offset = mantissa * (2^(exponent+8))
2031  * Returns the smallest allowed encoded offset that contains given @offset
2032  * The actual encoded offset returned is @offset + *@padding.
2033  */
2034 osd_cdb_offset __osd_encode_offset(
2035         u64 offset, unsigned *padding, int min_shift, int max_shift)
2036 {
2037         u64 try_offset = -1, mod, align;
2038         osd_cdb_offset be32_offset;
2039         int shift;
2040
2041         *padding = 0;
2042         if (!offset)
2043                 return 0;
2044
2045         for (shift = min_shift; shift < max_shift; ++shift) {
2046                 try_offset = offset >> shift;
2047                 if (try_offset < (1 << OSD_OFFSET_MAX_BITS))
2048                         break;
2049         }
2050
2051         BUG_ON(shift == max_shift);
2052
2053         align = 1 << shift;
2054         mod = offset & (align - 1);
2055         if (mod) {
2056                 *padding = align - mod;
2057                 try_offset += 1;
2058         }
2059
2060         try_offset |= ((shift - 8) & 0xf) << 28;
2061         be32_offset = cpu_to_be32((u32)try_offset);
2062
2063         OSD_DEBUG("offset=%llu mantissa=%llu exp=%d encoded=%x pad=%d\n",
2064                  _LLU(offset), _LLU(try_offset & 0x0FFFFFFF), shift,
2065                  be32_offset, *padding);
2066         return be32_offset;
2067 }